IEC CB protection unit PR12
PR512 are self-supplied relays and ensure complete protection of the installation without auxiliary power supply
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PR512 are self-supplied relays and ensure complete protection of the installation without an auxiliary power supply. They are used as switchboard protection units and provide protection of the medium voltage ABB circuit-breakers. PR512 is available in three solutions:
- PR512/P (50-51 protections)
- PR512/P (50-51-50N-51N protections)
- PR512/PD (50-51-50N-51N protections with dialogue)
Scope
- The PR512 are used as switchboard protection units and provide protection of the installations, combined with ABB medium voltage HD4 series circuit-breakers
Product benefits
- The PR512 are the self-supplied type of relay and ensure complete installation protection even without an auxiliary power supply
Product features
- Trip precision
- Wide setting range
- Operation ensured even with the primary circuit with single-phase power supply
- No limitation of the rated breaking capacity and short-time withstand current of the circuit-breaker even for the lowest rated currents of the relay
- Single and simultaneous adjustment of the three phases
- Constancy of characteristics and operating reliability
- Processing of the RMS value to express the true energy content of the current.